Automobile end cone inclined hole positive punching process

Abstract

The application discloses a kind of automobile end cone oblique hole positive punching process, it is set by convex surface and punching insert block, side punching is changed to positive punching, the precision and stability of end cone part are improved, the life of mould is also lengthened, production efficiency is improved, cost is saved.S1, install lower die assembly;Lower die assembly is installed on the workbench of punching machine;Lower die assembly includes lower die plate;First through hole is opened in lower die plate;Bolt is fixed on the workbench by passing through lower die plate;S2, install upper die assembly;Upper die assembly is installed on the slide of punching machine;Upper die assembly includes upper die plate;Bolt is connected by passing through upper die plate and slide;S3, punch;End cone is placed on convex die and is attached to punching insert block;Start punching machine, slide drives upper die plate to move downward, punch pin contacts end cone, concave die continues to go down, punch pin cuts end cone on waste material, concave die is attached to end cone, spring is compressed, punch pin is inserted into the third through hole of punching insert block, and punching is completed;S4, material is withdrawn.

Description

Technical Field

[0001] This invention belongs to the field of punching technology, specifically relating to a forward punching process for oblique holes in automotive end cones. Background Technology

[0002] Automotive end cones are installed inside the vehicle's air pipes to facilitate air intake or exhaust. The end cone is generally shaped like a frustum, but its outer surface has irregularly convex conical protrusions.

[0003] During the machining of end cones, punching operations are required on their irregular conical surfaces. The outer surface of the end cone has varying concavity and convexity, as well as inclined curved surfaces. The angle between the hole and the surface of the end cone part differs significantly, resulting in a large upward force generated during side punching. This leads to unstable hole positions, low punching success rate, and poor finished product quality. Therefore, a new punching equipment is needed. Summary of the Invention

[0004] In view of the shortcomings of the above-mentioned background technology, the purpose of this invention is to provide a forward punching process for oblique holes in automotive end cones. By setting up a convex surface and a punching insert, the side punching is changed to forward punching, which improves the accuracy and stability of end cone parts, extends the life of the mold, improves production efficiency, and saves costs.

[0005] To solve the above-mentioned technical problems, the objective of this invention is achieved as follows:

[0006] A forward punching process for a tapered oblique hole in automobiles includes the following steps:

[0007] S1, Install the lower die assembly; the lower die assembly is installed on the worktable of the punching machine; the lower die assembly includes a lower template; the lower template has a first through hole; bolts pass through the lower template and are fixed to the worktable;

[0008] A punch is fixed on the upper surface of the lower template; the upper surface of the punch protrudes at an angle to form a convex surface that matches the contour of the end cone; the convex surface is set at an angle upward, and the top of the convex surface is recessed to form a first pit, and a second through hole is opened on the bottom wall of the first pit.

[0009] The first recess contains a punched insert; the outer surface of the punched insert is curved to form an arc surface that matches the profile of the end cone; a third through hole is opened at the top of the punched insert, and the third through hole is located at the punching point; the first through hole, the second through hole and the third through hole are connected.

[0010] S2, Install the upper die assembly; the upper die assembly is installed on the slider of the punching machine; the upper die assembly includes an upper template; bolts pass through the upper template and connect to the slider; it also includes an upper pad, the upper pad has a first countersunk hole in the middle, and a fourth through hole in the upper pad;

[0011] It also includes a die; the lower surface of the die is recessed to form a concave surface that matches the profile of the end cone, and a fifth through hole is provided on the concave surface.

[0012] The punch is inserted into the first countersunk hole and passes through the fifth through hole. The upper template presses against the top of the punch. The spring passes through the fourth through hole and is compressed between the upper template and the die. The equal-height bolt passes through the upper template, the upper pad, and the die and is threadedly connected and fixed.

[0013] S3, punching; the end cone is placed on the punch and in contact with the punching insert; the punching machine is started, the slide moves the upper template downward, the punch contacts the end cone, the die continues to move downward, the punch cuts the waste on the end cone, the die and end cone are in contact, the spring is compressed, the punch is inserted into the third through hole of the punching insert, and the punching is completed.

[0014] S4, eject material; the upper template moves up, the die and the end cone separate, the spring releases its elastic force, the die moves down to reset, the punch moves up, waiting for the next punching.

[0015] Based on the above scheme and as a preferred embodiment of the above scheme: four lower limit posts are fixed on the upper surface of the lower template, and the four lower limit posts are arranged around the punch; four upper limit posts are fixed on the lower surface of the upper template, and the four upper limit posts are arranged around the die, with the lower limit posts and the upper limit posts facing each other.

[0016] Based on the above scheme and as a preferred embodiment: two first stops are fixed on the upper surface of the lower template, the two first stops are located on both sides of the punch, a first fixing hole is opened in the middle of the first stops, a stroke column is installed in the first fixing hole, and the stroke column protrudes out of the die; two second stops are fixed on the lower surface of the upper template, the two second stops are located on both sides of the die, the inner surfaces of the two second stops are recessed to form first grooves facing each other; it also includes a wear-resistant block, bolts pass through the wear-resistant block and are threadedly connected and fixed to the inner wall of the first groove, and the stroke column is inserted into the first groove and is in contact with the wear-resistant block.

[0017] Based on the above scheme and as a preferred embodiment of the above scheme: wear-resistant blocks are installed on all three side walls of the first groove.

[0018] Based on the above scheme and as a preferred embodiment of the above scheme: the lower surface of the upper template is recessed to form a second recess, and the spring is inserted into the second recess; a second countersunk hole is opened on the upper surface of the upper template, and the equal-height bolt is placed in the second countersunk hole.

[0019] Based on the above scheme and as a preferred embodiment of the above scheme: the lower surface of the upper template has four second countersunk holes, and four springs are respectively placed in the four second countersunk holes, with the four springs arranged around the punch.

[0020] The outstanding and beneficial technical effects of this invention compared to the prior art are:

[0021] Compared with the prior art, the automotive end cone oblique hole punching process of the present invention has a punch installed on the lower template, a punching insert installed on the top of the punch, the end cone placed on the punch, and the punching insert facing the position to be punched; the punching insert is set at the top to target the punch.

[0022] A top plate is installed below the top template, a punch is inserted into the top plate, a die is installed below the top plate, a spring is compressed between the top template and the die, and the punch passes through the die.

[0023] The punch punches holes in the end cone from top to bottom. The punch and die fix the end cone in place; this improves the precision and stability of the end cone parts, extends the life of the die, increases production efficiency, and saves costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a partial structural schematic diagram of the present invention.

[0026] Figure 3 This is a schematic diagram of the overall exploded structure of the present invention.

[0027] Figure 4 This is a partial exploded structural diagram of the present invention.

[0028] Figure 5 This is a partial exploded structural diagram of the present invention.

[0029] Reference numerals: Lower template 01; First through hole 010; Lower limit post 011; First stop block 012; First fixing hole 0120; Stroke post 013; Punch 02; Convex surface 020; First recess 021; Second through hole 022; Punch insert 03; Arc surface 030; Third through hole 031; Upper template 04; Upper limit post 040; Second stop block 041; First groove 0410; Second recess 042; Second countersunk hole 043; Upper pad 05; First countersunk hole 050; Fourth through hole 051; Die 06; Concave surface 060; Fifth through hole 061; Punch pin 07; Spring 08; Equal height bolt 09; Wear-resistant block 10; Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments;

[0031] This embodiment provides a forward punching process for a tapered oblique hole in an automotive vehicle, including the following steps:

[0032] S1, Install the lower die assembly; The lower die assembly is installed on the worktable of the punching machine; The lower die assembly includes a lower template 01; It is made of steel plate material; A first through hole 010 is opened on the lower template 01; Bolts pass through the lower template 01 and are fixed to the worktable; The first through hole 010 is used for waste material discharge;

[0033] A punch 02 is fixed on the upper surface of the lower template 01. The punch 02 is made of a metal block. The upper surface of the punch 02 protrudes at an angle to form a convex surface 020 that matches the contour of the end cone. The convex surface 020 is set obliquely upward, and the top of the convex surface 020 is recessed to form a first recess 021. A second through hole 022 is opened on the bottom wall of the first recess 021. The second through hole 022 is also used for waste discharge.

[0034] The first recess 021 is provided with a punched insert 03, which is made of a metal block; the outer surface of the punched insert 03 is bent to form an arc surface 030 that matches the profile of the end cone; a third through hole 031 is opened at the top of the punched insert 03, and the third through hole 031 is located at the punching point; the first through hole 010, the second through hole 022 and the third through hole 031 are connected; the third through hole 031 is used for waste discharge;

[0035] As shown above, the end cone fits onto the convex surface 020, which is erected and designed to be angled upwards. The position to be punched is placed above the top, and the punching is changed from top to bottom to a direct punch, resulting in uniform force, small hole deformation, and improved yield and quality.

[0036] The bolt passes through the punch insert 03 and is fixed in the first recess 021 of the convex surface 020. The hardness of the punch insert 03 is greater than that of the punch 02. The punch insert 03 is directly impacted by the punch 07. After the punch insert 03 is damaged, it can be replaced, which is more practical and saves costs.

[0037] S2, Install the upper die assembly; the upper die assembly is installed on the slider of the punching machine; the upper die assembly includes an upper template 04; the upper template 04 is made of metal plate; bolts pass through the upper template 04 and connect it to the slider;

[0038] It also includes an upper pad 05, which is also made of metal plate; the upper pad 05 has a first countersunk hole 050 in the middle and a fourth through hole 051 in the upper pad 05.

[0039] It also includes a die 06, which is made of mold steel; the lower surface of the die 06 is recessed to form a concave surface 060 that matches the profile of the end cone, and a fifth through hole 061 is provided on the concave surface 060; the concave surface 060 is used to fit the surface of the end cone, and the fifth through hole 061 is used for the punch 07 to pass through.

[0040] Punch 07 is inserted into the first countersunk hole 050 and passes through the fifth through hole 061. The upper template 04 presses down on the top of punch 07. The top of punch 07 is fixed in the first countersunk hole 050, and the bottom of punch 07 protrudes from the die 06 to punch the end cone.

[0041] Spring 08 passes through the fourth through hole 051 and is compressed between the upper template 04 and the die 06. Equal height bolt 09 passes through the upper template 04, the upper pad 05 and the die 06 and is threadedly connected and fixed.

[0042] As shown above, the upper pad 05 is fitted in the middle of the equal height bolt 09 and can move up and down. The spring 08 presses against the die 06, which can perform punching and stripping.

[0043] S3, punching; the end cone is placed on the punch 02 and in contact with the punching insert 03; the punching machine is started, the slide moves the upper template 04 downward, the punch 07 contacts the end cone, the die 06 continues to move downward, the punch 07 cuts the waste on the end cone, the die 06 is in contact with the end cone, the spring 08 is compressed, the punch 07 is inserted into the third through hole 031 of the punching insert 03, and the punching is completed;

[0044] S4, material ejection; upper template 04 moves upward, die 06 separates from end cone, spring 08 releases its elastic force, die 06 moves downward to reset, punch 07 moves upward, waiting for the next punching.

[0045] As described above, this technical solution adopts an upper and lower punching method, which is suitable for use with existing ordinary stamping machines. It changes the traditional side punching method to front punching. At the same time, a punching insert 03 is installed on the punch 02 to realize the fixing and punching of the end cone.

[0046] Furthermore, four lower limit posts 011 are fixed on the upper surface of the lower template 01, and the four lower limit posts 011 are arranged around the punch 02; the lower limit posts 011 are cylindrical, and bolts pass through the lower limit posts 011 to connect and fix them to the lower template 01.

[0047] The lower surface of the upper template 04 has four upper limit posts 040, which are set around the cavity mold 06. The lower limit post 011 is set opposite to the upper limit posts 040.

[0048] As described above, when the upper template 04 descends to its lowest position, the upper limit post 040 and the lower limit post 011 abut against each other, which restricts the downward movement and prevents the die 06 from moving too low, thus damaging the end cone product.

[0049] Furthermore, two first stops 012 are fixed on the upper surface of the lower template 01, and bolts pass through the first stops 012 to connect and fix them to the lower template 01; the two first stops 012 are located on both sides of the punch 02, and a first fixing hole 0120 is opened in the middle of the first stop 012. A stroke column 013 is installed in the first fixing hole 0120, and the stroke column 013 protrudes from the die 06; the stroke column 013 is long and is embedded in the first fixing hole 0120 and fixed.

[0050] Two second blocks 041 are fixed on the lower surface of the upper template 04. The two second blocks 041 are located on both sides of the cavity 06. The inner surfaces of the two second blocks 041 are recessed to form first grooves 0410 facing each other. The second blocks 041 have two U-shaped openings facing each other. Bolts pass through the second blocks 041 and are connected and fixed to the upper template 04.

[0051] It also includes a wear-resistant block 10, with bolts passing through the wear-resistant block 10 and threadedly connected to the inner wall of the first groove 0410 for fixation. A stroke post 013 is inserted into the first groove 0410 and abuts against the wear-resistant block 10. The wear-resistant block 10 can be made of wear-resistant metal or rubber, serving a cushioning function.

[0052] As described above, the upper template 04 moves downward, and the stroke column 013 is inserted into the first groove 0410 of the second stop block 041. The wear-resistant block 10 is in contact with the stroke column 013, which serves as a guide and limiter. This makes the punching position of the punch 07 on the end cone more accurate, and the punch 07 will not shift due to the irregular surface of the end cone caused by long-term punching. The wear-resistant block 10 has a buffering effect to prevent the stroke column 013 from colliding directly with the second stop block 041.

[0053] Furthermore, wear-resistant blocks 10 are installed on the three side walls of the first groove 0410.

[0054] As described above, wear-resistant blocks 10 are provided on all three surfaces of the contact stroke column 013 to extend its service life;

[0055] Furthermore, the lower surface of the upper template 04 is recessed to form a second recess 042, and the spring 08 is inserted into the second recess 042.

[0056] The upper surface of the upper template 04 is provided with a second countersunk hole 043, and the equal height bolt 09 is placed in the second countersunk hole 043.

[0057] As described above, both the second recess 042 and the second countersunk hole 043 serve a limiting function. The top of the spring 08 is inserted into the second recess 042 to prevent it from expanding and deforming outward; the equalizing bolt 09 moves up and down within the second countersunk hole 043.

[0058] Furthermore, the lower surface of the upper template 04 has four second countersunk holes 043, and four springs 08 are respectively placed in the four second countersunk holes 043, with the four springs 08 arranged around the punch 07.

[0059] As mentioned above, setting four springs 08 can ensure its compression and release effect and increase the precision of the die 06 in place.

[0060] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In this invention, unless otherwise expressly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw-in," etc., should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection.

[0062] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A process for straight punching of an automobile end cone inclined hole, characterized in that: The method comprises the following steps: S1, installing a lower die assembly; the lower die assembly is installed on a workbench of a punching machine; the lower die assembly comprises a lower die plate; a first through hole is formed in the lower die plate; a bolt is fixed to the workbench through the lower die plate; A punch is fixed to an upper surface of the lower die plate; an upper surface of the punch is inclined and protrudes to form a convex surface matching a profile of the end cone; the convex surface is arranged obliquely upward, a top of the convex surface is recessed to form a first pit, and a bottom wall of the first pit is provided with a second through hole; A punching insert is arranged in the first pit; an outer surface of the punching insert is curved to form an arc surface matching the profile of the end cone, a top of the punching insert is provided with a third through hole, and the third through hole is located at a punching position; the first through hole, the second through hole and the third through hole are communicated; S2, installing an upper die assembly; the upper die assembly is installed on a sliding block of the punching machine; the upper die assembly comprises an upper die plate; a bolt is connected to the sliding block through the upper die plate; further comprising an upper backing plate, the upper backing plate is provided with a first countersunk hole in the middle, and the upper backing plate is provided with a fourth through hole; Further comprising a concave die; a lower surface of the concave die is recessed to form a concave surface matching the profile of the end cone, and the concave surface is provided with a fifth through hole penetrating upward and downward; A punch pin is inserted into the first countersunk hole and penetrates through the fifth through hole, the upper die plate presses the top of the punch pin, a spring is compressed between the upper die plate and the concave die through the fourth through hole, and an equal-height bolt is threadedly connected and fixed through the upper die plate, the upper backing plate and the concave die; An upper surface of the lower die plate is fixed with two first stop blocks, the two first stop blocks are located on both sides of the punch, a first fixing hole is formed in the middle of the first stop block, a stroke column is installed in the first fixing hole, and the stroke column protrudes from the concave die; a lower surface of the upper die plate is fixed with two second stop blocks, the two second stop blocks are located on both sides of the concave die, and inner side surfaces of the two second stop blocks are respectively recessed to form first grooves arranged opposite to each other; further comprising a wear-resistant block, a bolt is threadedly connected and fixed to an inner wall of the first groove through the wear-resistant block, and the stroke column is inserted into the first groove and attached to the wear-resistant block; Wear-resistant blocks are installed on three side walls of the first groove; S3, punching; the end cone is placed on the punch and attached to the punching insert; the punching machine is started, the sliding block drives the upper die plate to move downward, the punch pin contacts the end cone, the concave die continues to move downward, the punch pin cuts off the waste on the end cone, the concave die is attached to the end cone, the spring is compressed, the punch pin is inserted into the third through hole of the punching insert, and the punching is completed; S4, material returning; the upper die plate moves upward, the concave die is separated from the end cone, the spring releases the elastic force, the concave die moves downward to reset, the punch pin moves upward, and the next punching is waited.

2. The automotive end cone hole straight flushing process of claim 1, wherein: An upper surface of the lower die plate is fixed with four lower limit columns, and the four lower limit columns are arranged around the punch; a lower surface of the upper die plate is fixed with four upper limit columns, and the four upper limit columns are arranged around the concave die, and the lower limit columns and the upper limit columns are arranged opposite to each other.

3. The automotive end cone angle hole straight punching process according to claim 1, characterized in that: A lower surface of the upper die plate is recessed to form a second pit, and a spring is inserted into the second pit; an upper surface of the upper die plate is provided with a second countersunk hole, and an equal-height bolt is arranged in the second countersunk hole.

4. The automotive end cone oblique hole straight punching process according to claim 3, characterized in that: The lower surface of the upper die plate is recessed with four second countersunk holes, four springs are respectively arranged in the four second countersunk holes, and the four springs are arranged around the punch pin.

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